Paul: wrt. your statement "eol extension tomorrow. I don't really use it much,". This can't be really true: either you use it, or you don't. If you use it at all, then you also use it MUCH: Python is a heavy user of the eol extension, and the entire Python hg repository can't work without it. It's an absolute requirement that anybody working on the CPython repository has the eol extension enabled.

In fact, the eol extension was added to Mercurial because of CPython, and was basically designed on python-dev. Look at CPython's .hgeol file to see what files are affected by it (it's basically every file under source control).